I have two datacenter, dc1 3 nodes, dc2 3 nodes. For some reason, dc1 3 nodes are sync and have the latest data.
I run "nodetool repair -dcpar -full " on the first node of dc2. But after the repair, from Cassandra system log, repair for all range successful. But only node1 and node3 on standby got sync. node2 still missing the data.
Why this should be happened? any procedure needed before nodetool repair?